Precision, Very Low Noise, Low Input
Bias Current Operational Amplifiers
AD8671/AD8672/AD8674
FEATURES
PIN CONFIGURATIONS
Very low noise: 2.8 nV/√Hz, 77 nV p-p
Wide bandwidth: 10 MHz
NC
–IN
+IN
V–
1
2
3
4
8
7
6
5
NC
V+
NC
–IN
+IN
V–
1
2
3
4
8
7
6
5
NC
V+
AD8671
AD8671
TOP VIEW
TOP VIEW
Low input bias current: 12 nA max
Low offset voltage: 75 μV max
High open-loop gain: 120 dB min
Low supply current: 3 mA per amplifier
Dual-supply operation: 5 V to 15 V
Unity-gain stable
OUT
NC
OUT
NC
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NC = NO CONNECT
NC = NO CONNECT
Figure 1. 8-Lead SOIC_N (R-8)
Figure 2. 8-Lead MSOP (RM-8)
No phase reversal
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
OUT A
–IN A
+IN A
V–
1
2
3
4
8
7
6
5
V+
AD8672
AD8672
OUT B
–IN B
+IN B
OUT B
–IN B
+IN B
TOP VIEW
TOP VIEW
APPLICATIONS
PLL filters
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Filters for GPS
Figure 3. 8-Lead SOIC-N (R-8)
Figure 4. 8-Lead MSOP (RM-8)
Instrumentation
Sensors and controls
Professional quality audio
OUT A
–IN A
+IN A
V+
1
2
3
4
5
6
7
14 OUT D
13 –IN D
12 +IN D
11 V–
OUT A
–IN A
+IN A
V+
1
2
3
4
5
6
7
14 OUT D
13 –IN D
12 +IN D
11 V–
AD8674
TOP VIEW
AD8674
GENERAL DESCRIPTION
TOP VIEW
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The AD8671/AD8672/AD8674 are very high precision amplifiers
featuring very low noise, very low offset voltage and drift, low
input bias current, 10 MHz bandwidth, and low power
+IN B
–IN B
OUT B
10 +IN C
+IN B
–IN B
OUT B
10 +IN C
9
8
–IN C
9
8
–IN C
OUT C
OUT C
consumption. Outputs are stable with capacitive loads of over
Figure 5. 14-Lead SOIC_N (R-14)
Figure 6. 14-Lead TSSOP (RU-14)
1000 pF. Supply current is less than 3 mA per amplifier at 30 V.
The AD8671/AD8672/AD8674’s combination of ultralow noise,
high precision, speed, and stability is unmatched. The MSOP
version of the AD8671/AD8672 requires only half the board
space of comparable amplifiers.
Applications for these amplifiers include high quality PLL
filters, precision filters, medical and analytical instrumentation,
precision power supply controls, ATE, data acquisition, and
precision controls as well as professional quality audio.
The AD8671/AD8672/AD8674 are specified over the extended
industrial temperature range (–40°C to +125°C).
The AD8671/AD8672 are available in the 8-lead SOIC and
8-lead MSOP packages. The AD8674 is available in 14-lead
SOIC and 14-lead TSSOP packages.
Surface-mount devices in MSOP packages are available in tape
and reel only.
Rev. C
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infringements of patents or other rights of third parties that may result from its use.
Specifications subject to change without notice. No license is granted by implication
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